Examlex
Evidence found in __________ indicates that crime maps have been around for several thousand years.
Mixture
A physical combination of two or more substances that retain their own identities and properties and can be separated by physical means.
Compound
A substance made up of two or more different elements chemically bonded together in a fixed ratio.
Alloy
A mixture of metals or a mixture of a metal and another element, achieved through melting and mixing.
Chromatography
A method used to separate components of a mixture based on the differential affinities of compounds to a mobile phase and a stationary phase.
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